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Fixing Stuck Pending Transactions in MetaMask
Every now and then, a transaction running through MetaMask will get stuck; the transaction does not process on the blockchain, and even pressing the "cancel" button doesn't help.
If you encounter this problem, use this method to clear your backlog and "unstick" the transaction. This method works by overwriting the stuck transaction with another, higher-priority one.
Follow these steps using the MetaMask plugin on your desktop computer.
1. Open your MetaMask plugin.
2. Click on the colorful circle icon on the top-right and click Settings from the dropdown menu.
3. In the Settings menu, select Advanced.
4. Scroll down until you see Advanced gas controls. Toggle this to ON.
5. Still in Advanced settings, keep scrolling until you see Customize transaction nonce. Toggle this to ON.
We’re now going to find the transaction that’s stuck, and make a note of the “nonce”. That’s a kind of identifier, which we’ll re-use later.
6. Go back to the top page of MetaMask. In the “Assets” tab, find the token type of your stuck transaction (in this case, CST).
7. In the token’s menu, find your Pending transaction in the Queue area. Click on your transaction for more details.
8. Look for the Nonce entry and write this number down (you will use it later).
Now we’re going to make a new transaction to replace the stuck one. We’ll customize the Nonce number, so that it’s the same as the one that you just wrote down.
8. Create a new transaction to replace your stuck transaction. This time around, increase the Transaction Fee. Here we’ve increased it from 9 to 20. This will make it more likely for your transaction to be added to a block.
9. On the confirmation page, make sure your Gas Price is now at your new, higher amount.
10. Find the CUSTOM NONCE entry and change the nonce to the number you wrote down in step 7. Now click Confirm.
11. Your new transaction should now be accepted into a block. To check, open MetaMask and click the Activity tab.
12. Your completed transaction should show at the top of your Activity list. If it still says “Pending” in orange you’ll need to wait a little longer, or try the process again with an even higher transaction fee (gas price).
Since no wallet can create two transactions of the same nonce, if the replacement transaction you make is successful, your stuck transaction will be canceled.